沈阳航空航天大学学报2026，Vol.43Issue(2)：56-62,7.DOI:10.3969/j.issn.2095-1248.2026.02.008
未掺杂钙铁石结构氧化物新型固体电解质的制备与性能
Preparation and performance of novel solid electrolytes based on undoped brownmillerite structure oxides
摘要
Abstract
To enhance the output performance of solid oxide fuel cell(SOFC)in the intermediate-to-low temperature range(800-350℃),undoped Ba2 In2 O5 was applied for the first time to SOFC power generation units,and the effect of this special layered structure on the electrochemical performance of the cells was systematically investigated.Experimental results demonstrate that the layered structure provides ideal channels for synergistic and efficient transport of oxygen ions and protons.The SOFC employing this material as electrolyte achieved a remarkable power density of 567 mW·cm-2 at 550℃while maintaining effective output performance even at 150℃.Material characterization revealed dual oxygen ion-proton conductivity above 450℃,with predominant proton conduction in the low-temperature regime below 450℃.Through XPS and in situ Raman spectroscopy analyses,the formation of intrinsic oxygen vacancies under elevated temperatures was observed,with their impact on ionic conduction properties thoroughly investigated.It was established that the distinctive brownmillerite structure of BIO enables its exceptional performance as a medium-low temperature SOFC electrolyte material,providing a promising candidate material for advancing low-temperature operation of SOFCs.关键词
SOFC/固体电解质/离子导体/钙铁石/未掺杂Key words
SOFC/solid electrolyte/ionic conductor/brownmillerite/undoped分类
数理科学引用本文复制引用
丁宇,徐丹,牛宇乐,金虹雯,徐世峰,杨旭..未掺杂钙铁石结构氧化物新型固体电解质的制备与性能[J].沈阳航空航天大学学报,2026,43(2):56-62,7.基金项目
国家自然科学基金(项目编号:51402197). （项目编号:51402197）
